Portable high chair



FIG. 1 is a top view of a portable high chair showing our new design.

FIG. 2 is a front view thereof.

FIG. 3 is a side view thereof.

FIG. 4 is the other side view thereof.

FIG. 5 is a rear view thereof.

FIG. 6 is an underside view thereof; and,

FIG. 7 is an overhead perspective view thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portable high chair, as shown and described. 